Calendar-clock



L t e e h S W e e h S 2 M K U0 L0 Tum wR m M m E 0 A (No Model.)

No. 551,556. Patented Dec. 17, 1895.

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t e e h S m e e h S 2 M m m 0 R NA Mm u A A 0 (No Model.)

Patented Dec. 17, 1895.

lNVENTOf? W/TNESSES:

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UNITED STATES PATENT OFFIcE.

ALFRED ELMORE MCCOLLUM, OF \VEST LEISEURING, PENNSYLVANIA.

CALENDAR=CLOCK.

SPECIFICATION forming part of Letters Patent No. 551,556, dated December17, 1895.

Application filed February 14, 1895. Serial No. 538,388- (No model.)

To all whom, it may concern.-

Be it known that I, ALFRED ELMOEE MC- OOLLUM, of Nest Leisenring, in thecounty of Fayette and State of Pennsylvania, have invented a new andImproved Dial-Calendar for Clocks or atches, of which the following is afull, clear, and exact description.

The invention relates to calendars attached to and driven from watches,clocks or like devices.

The object of the invention is to provide a new and improved calendarwhich is comparatively simple and durable in construction, readilyapplied to a watch or clock, and arranged to properly indicate themonth, the day of the month, and the day of the week.

The invention consists principally of a rotatable sleeve carrying themonth-hand, a shaft fitted to rotate in the said sleeve and adapted tobe driven from the clockwork, and a double hand secured on the saidshaft, the hands standing at angles one to the other, one indicating theday of the month and the other the day of the week.

The invention also consists in. certain parts and details andcombinations of the same, as will be hereinafter fully described, andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the views.

Figure 1 is a face view of the improvement as applied on a clock. Fig. 2is an enlarged face view of the improvement. Fig. 3 is a sectional frontview of the same 011 the line 3 3 of Fig. 4:. Fig. at is a cross-sectionof the same as applied, and Fig. 5 is a perspective view of a key forholding the sleeve and shaft in position. Fig. 6 is a perspective viewshowing the construction of the stationary sleeve whereon then1onthindicating hand or pointer is mounted.

The improved dial calendar is provided with a dial A, formed either onthe face of the dial B of a clock O or a watch, or the said dial A maybe made of a suitable material and attached to the face of the dial B inany desired manner. On the face of the dial A, and near the centerthereof, is arranged a graduation A, indicating the months of the yearand the days in each month. Concentric to this 'raduation A is a secondcircular graduation A divided into thirty-five parts,

indicating the days of the week for five weeks, and next to thisgraduation A is a third circular graduation A likewise divided intothirty-five parts corresponding with the parts in the graduation A andcontaining the conseeutive numerals from 1 to 31 and four blank spaces.Each of the parts in the graduations A and A is provided with theletters A and P, indicating the corresponding parts of the day, A. M.and P. M.

On the graduation A indicates a pointer D, secured on the outer end of asleeve E, (seen in detail in Fig. 4,) extending transversely and mountedto turn in bearings formed in the dials A and B, as indicated in Fig.4-. This sleeve E is normally held in a fixed position, and the pointerD is shifted by hand at the end of each month. On the grad nations A andA indicate the hands F and F, standing at angles one to the other, andboth secured on the front end of a shaft G mounted to turn loosely inthe sleeve E. On the rear end of this shaft G is secured a toothed wheelH, having seventy teeththat is, double the number of the parts in thegraduations A and A -and this toothed wheel H is in mesh with a tooth Isecured on the sleeve I carrying the hour-hand l of the clock 0. Now itwill be seen that on every full revolution of the hour-hand I the toothI will turn the wheel 11 the distance between two teeth, so as to changethe position of the hands F and F correspondingly, and for every tworevolutions of the said sleeve 1, carrying the hourhand 1 the hands Fand F are shifted from one part of the graduations A and A to the nextfollowing one. Thus the hand F indicates the day of the week as well asthe corresponding half of the day, A. M. or P. hi., and the hand Findicates the day of the month and corresponding half of the day.

A spring J coiled on the rear end of shaft G extends between the hub ofthe wheel H and the inner end of the sleeve E, (see Fig. 4,) and a key Kis employed tohold the sleeve E stationary against rotation and alsoagainst longitudinal movement on the shaft G. This key K is preferablymade in two parts K and K pivotally connected with each other at K andeach formed at one end with a notch K adapted to engage an annulargroove G in the shaft G, which turns between said notched ends of theparts K and K The said notched ends of the two parts K and K of the keyK extend through slots E in the sleeve E, and the outer ends of the saidparts are adapted to be fastened together by means of a setscreW Ksecured to the casing or frame of the clock, said set-screw beingadapted to be placed in position after the notched ends of the parts ofthe key have been inserted through slots E in sleeve E and their notchesK engaged with the groove G in shaft G. The key K is thus held inposition on the clockframe and the screw K is screwed up, as indicatedin Fig. 3, and serves to hold the sleeve E stationary in its properposition.

At the end of the month the operator has to change the position of thehands F and F relative to each other and move the hand F from the lastday of the month to the first one, with the hand F indicating thecorresponding day in the week. At the same time the operator changes theposition of the pointer D to indicate on the proper month. Thus by thearrangement described the hands F and F move in unison and are drivenfrom the mechanism of the clock or watch to inclicate the day of theweek and the day of the month.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. In a device ofthe character described,

the combination of a rotative shaft, having a groove, a sleeve inclosingthe shaft and having slots opposite the groove therein and a key adaptedto be secured to the casing projecting through the slots in the sleeveand engaging the groove in the shaft, substantially as set forth.

. 2. A dial calendar, comprising a sleevc mounted to turn and carrying amonth hand, a shaft mounted to turn in the sleeve and carrying two handsindicating the day of the month and the day of the week, means forrotating the said shaft, and a key held on the said sleeve and engagingan annular groove in the said shaft, substantially as shown anddescribed.

3. A dial calendar, provided with a key made in two parts havingoppositely arranged notches, and a set screw for fastening the two partstogether, substantially as described.

4. A dial calendar, having a key consisting of two parts pivotedtogether at their central portions and each having near one endoppositely arranged notches, and a set screw secured to the opposite endof one part and adapted to engage the other part to lock said parts inposition, substantially as set forth.

ALFRED ELMORE MCCOLLUM.

Witnesses E. A. HUMPHRIES, J. H. STINER.

